Uart issue NRF_BREAKPOINT_CND

[Rohit Rajapure]

Hello All,

I am developing project which is based on nRF52840 and uses UART.

This my nRF52840 UART connect to STM's MCU UART.

If I do the connect Rx-Tx, Tx-Rx and VCC, GND then I power up the STM board my nRF code entering into below attached app_error_weak file.

Attached is the image and code.

Please help me what is the problem it very urgent for me.

uart _Exercise20210513.zip

Thanks and Regards

Rohit R

[Karl Ylvisaker]

Hello Rohit,

To supplement @anweil 's answer, please make sure that you have DEBUG defined in your preprocessor defines, like shown in the included image.

This will make a detailed error message be printed to your logger whenever a non-NRF_SUCCESS error code is passed to an APP_ERROR_CHECK.
Do this, and let us know what this error message reads.

Best regards,
Karl

[Rohit Rajapure]

HI Karl,

Thank you for the quick response.

No, DEBUG is not mentioned in preprocessor defination window.

- I will do this

And one more thing is I am using Tx- P0_6 and Rx-P0_8. these nRF pins connected to Stm board.

will this log print still on putty?

Thanks and Regards

Rohit

[Karl Ylvisaker]

Rohit Rajapure said:

Thank you for the quick response.

No problem at all, I am happy to help!

Rohit Rajapure said:

And one more thing is I am using Tx- P0_6 and Rx-P0_8. these nRF pins connected to Stm board.

will this log print still on putty?

You will then have to use the RTT backend for the logger, you can configure this in your sdk_config.h file.
If you are working out of the ble_app_uart example, it is already configured to use the RTT backend.
The RTT messages will then show up in the SES Debug terminal, or you could download Segger's own RTT Viewer application to see them in a separate terminal.

Best regards,
Karl 

[Rohit Rajapure]

Hi Karl,

Thank you so much,

I will check with suggested example and enable RTT in my code and let you know the log.

Thanks and Regards

Rohit R

[Karl Ylvisaker]

Great, the error message will be very helpful for the continues debugging here.

Please let me know if you have any issues with or questions about getting the logger to use the RTT backend.

Best regards,
Karl

[Rohit Rajapure]

Hi Karl,

As per your suggestion, I have enabled the RTT backend logger in my code but unable to print any data on terminal.

Let me know what is the issue.

Thanks and Regards

Rohit R

[awneil]

Which terminal are you using?

If the terminal in SES, then what SES version?

See: https://devzone.nordicsemi.com/f/nordic-q-a/45985/nrf_log-not-working-on-segger-embedded-studio/275426#275426

[Rohit Rajapure]

Hi Awneil,

SES - v4.16.

Please find the attached image.

Thanks and Regards

Rohit